Road paver



July 3, 1962 T. MCKINNEY 3,041,945

ROAD PAVER Filed April 5, 1959 4 Sheets-Sheet 1 Ted McKinney 1N VEN TOR.

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July 3, 1962 T. M KINNEY 3,041,945

ROAD PAVER Filed April 5, 1959 4 Sheets-Sheet 2 July 3, 1962 Filed April 3, 1959 4 Sheets-Sheet 4 Fig.5

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United States Patent 3,ti4l,945 ROAD PAVER Ted McKinney, RED, Box 17, Hamilton, Mont. Filed Apr. 3, 1959, Ser. No. 893,937 9 Claims, (Cl. 94-

This invention comprises a novel and useful road paver and more particularly relates to an apparatus for depositing or applying a coat of paving material to a surface. v

The primary object of the invention is to provide an apparatus which will facilitate and enable the applying of a layer or coating of paving material to a surface of a predetermined thickness and with a very precise control of the application of such paving material.

The further object of the invention is to provide a road paving apparatus in accordance with the foregoing object which shall be capable of applying a coating or layer of paving material of a very precisely controlled thickness to the surface of a road or the like, rolling or packing this layer of paving material and forming sharp precise side edges of the paving material.

A further object of the invention is to provide a paving apparatus in accordance with the foregoing object which would uniformly distribute the paving material across the entire width of the apparatus to insure uniform feeding of the material from the apparatus upon the surface to be paved.

Still another object of the invention is to provide a road pavin apparatus in accordance with the preceding objects wherein the compression or packing roller of the device shall be journal-led for free floating action in order to permit independent control of the thickness of the coating of paving material applied.

A still further object of the invention is to provide a paving apparatus in accordance with the preceding objects which shall have improved means for readily varying the vertical adjustment of the body of the apparatus upon its supporting axle and wheels, and this independently of the journalling of the packing roller in the body of the apparatus.

An additional important object of the invention is to provide a paving apparatus in accordance with the above mentioned objects which shall have an independent control means for regulating precisely the thickness of the layer of material applied by the apparatus to a road bed.

Still another object of the invention is to provide an apparatus in accordance with the hereinbefore set forth objects which may be readily supplied with additional paving material from time to time by a truck or the like as the device applies a coating or layer of paving material to a road bed.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

FIGURE 1 is a top plan view of a road paving apparatus in accordance with this invention;

FIGURE 2 is a rear elevational view of the apparatus of FIGURE 1;

FIGURE 3 is a side elevational view of the apparatus of FIGURE 1, showing the manner in which the same is attached to a propulsive means such as the rear end of a tractor vehicle or truck, and showing in dotted lines the manner in which the dump body of a truck may discharge additional paving material into the apparatus while the latter is being towed by the truck to eifect the laying of paving material upon a road bed;

FIGURE 4 is a side elevational view of the apparatus but showing the body in its lowered position into which Patented .Iuiy 3, I962 ice 2 it is moved during the applying of a layer of paving material to a road bed;

FIGURE 5 is a vertical transverse sectional. view taken substantially upon the plane indicated by the section line 55 of FIGURE 1 and showing the interior of the apparatus and of the paving material chamber thereof and of the paving material feeding means therein;

FIGURE 6 is a vertical longitudinal sectional view taken substantially upon the plane indicated by the section line 66 of FIGURE 5 and showing further details of the interior of the apparatus and of the internal arrangement of various parts therein;

FIGURE 7 is a detail view showing in vertical transverse section and upon an enlarged scale a portion of a side wall of the apparatus and in particular the Wheel and support means of the apparatus; 7

FIGURE 8 is a vertical transverse sectional detail view taken upon an enlarged scale substantially upon the plane indicated by the section line 8-8 of FIG- URE 6 and showing in particular the adjusting means for controlling the vertical position of the scraper blade which controls the thickness of the coating or layer of paving material applied by the apparatus to a road bed;

FIGURE 9 is a detail view being taken in vertical transverse sections upon an enlarged scale substantially upon the plane indicated by the section line 9--9 of FIGURE 1 and showing in particular the mounting of the packing roller of the apparatus and the free floating mounting of the same; and

FIGURE 10 is a further detail view in horizontal section being taken substantially upon the plane indicated by the section line Ill-10 of FIGURE 5 and upon an enlarged scale and showing guide means for slidably retaining and mounting the scraper blade upon the side and rear end Walls of the apparatus.

Referring first to FIGURE 3 it will be observed that the numeral 10 designates generally the suitable embodiment of the road paving apparatus embodying therein the principles of this invention and which is shown as being detachably coupled as by a draft means indicated at 12 to a rear portion of a dump truck 14- or other tractor vehicle which comprises a propulsive means for the paving apparatus. The numeral 16 indicates the pivotally mounted dump body of the truck which may be tilted from its load carrying, horizontal position shown in full lines in FIGURE 3 to a tilted dotted line position therein, in which latter position the paving material carried by the dump body can be discharged into the open upper end or inlet opening of the paving apparatus, from whence this material is continuously discharged from the open bottom end of the apparatus and spread upon a road bed as the propulsive means 14 and the paving apparatus 16 are moved progressively along the road bed.

Referring now more particularly to the drawings it will be observed that the road paving apparatus 10 consists of a pair of substantially vertical parallel side walls each indicated by the numeral 18 together with a forward inclined front end Wall 20, see FIGURE 6, and a substantially vertical rear end wall 22. It will be observed that the end wall 22 is disposed intermediate the front and rear ends of the side Walls, extends from the upper edge of the latter to a point slightly above the lower edges of the side walls.

The draft means 12 previously mentioned, as shown more clearly in FIGURE 6 may conveniently comprise an upper member 24 whose rear end is secured as at 26 to suitable apertured lugs 28 upon the front end wall 2@, together with a brace link 30 pivotally connected at its front and rear ends as at 32 and 34 to corresponding lugs 36 and 38 upon the member 24 and upon the front end wall 20. l

As shown in FIGURE 3, the forward end of the member 24 maybe detachably secured as by a connecting pin 40 to a suitable yoke 42 secured to the tractor vehicle or propulsive means 14, whereby the paving apparatus may be detachably secured thereto while accommodating limited vertical oscillations.

Referring now especially to FIGURES l3, 6 and 9, it will be observed that rearwardly of the rear end wall 22, the body of the apparatus has disposed between the side walls 18. a cylindrical packing roller 44. The packing roller includes stub axles or pintles 46 which are received in hearings or journal members 48 being retained therein as by fasteners such as cotter pins 50, see FIGURE 9. The side walls 18 of the body portion of the paving apparatus have vertically extending slots 52 therein in which are slidably received the annular grooves 54 of the journal or bearing members 48 as shown clearly in FIGURE 9. The arrangement is such that the packing roller 44 is capable of free vertical movement relative to the body by virtue of the free sliding engagement of its journals 48 in these slots 52.

By this means, the packing rollers weight is supported directly upon the ground or the layer of paving material applied to the surface of road bed on which the apparatus passes, and is not directly carried by the side walls 18 of the body of the apparatus.

From inspection of FIGURES 1 and 6 it will be observed that the body of the apparatus has an open top and an open bottom, there being defined by means of a pair of side walls 18 and the front and rear end walls 28 and 2.2 a chamber adapted to receive paving material There is provided a combined body supporting and mounting means and a paving material feeding means. To this end, the side walls 18 have vertical slots 68 therein, see in particular FIGS. and 7, and a shaft or axle 62 extends transversely between the side walls and has diametrically reduced end portions 64 extending through the side walls and journalled in bearing or journal members 66 which have circumferential channels or grooves 68 which are slidingly and guidingly received in the slot 66. Thus, the shaft 62 is rotatably journalled in the bearing 66 which in turn are freely slidable in the vertical slot 68 in the side walls.

The extending ends 64 of the shaft have radially enlarged mounting flanges 70 thereon upon which are movably secured as by fastening bolts 72 suitable supporting wheels 74. The axles and wheels thus serve to support the apparatus for movement of the same.

Provision is made also to adjust vertically the position of the shaft or axle 62 with respect to the side walls 18 of the apparatus. For this purpose there are secured laterally and outwardly projecting brackets in the form of housings as at 76 which are secured to the side Walls as by welding or the like as at 78. Suitable brace members 80 serve to Iigidify the mounting of these bracket housings upon the side walls. Extending through vertically aligned bores 82 and 84 in the top and bottom surfaces of the bracket housing 76 are adjusting rods 86. These rods are externally threaded as at 88 at the upper ends and receive thereon manually operated internally threaded adjusting wheels 90 which are received between the top and bottom surfaces of the bracket housing 76 and project beyond the d journalled the ends of the extremities 64, the latter being retained therein as by suitable fasteners such as cotter pins or the like as at 94.

The arrangement is such that by manipulating the hand wheels 90, the rods 86 may be raised or lowered relative to the housing 76 to thus vertically adjust the axle 62. Thus the body of the paving device can be raised or lowered relative to the supporting wheels and to the road surface over which the device travels.

Between the side walls 18, the shaft 62 is provided with a plurality of circumferentially and axially spaced arms or spikes as at 96. These members upon rotation of the shaft as the device travels forward serve to agitate and maintain in a loose condition the paving material discharged into the chamber. In addition, as will be readily apparent from FIGURE 5, the progressive axial and circumferential spacing of these arms or spikes 96 will cause a transverse feeding of the material across the entire width of the chamber to thus maintain an even supply of material for feeding from the open bottom end of the apparatus as set forth hereinafter.

Referring now particularly to FIGURES 4-7 in conjunction with FIGURE 9 it will be observed that each of the side walls 18 has detachably secured as by fastening bolts 98 a pair of edger blades 100. These blades are secured to the lower edges of the side walls and extend downwardly therebeneath as shown best in FIGURES 7 and 9. Although these blades may be disposed on either the interior or exterior surface of the side walls, it is preferred to provide them upon the exterior surface, as illustrated. The purpose of these blades is to slide upon the surface or road bed upon which the paving material is to be laid in order to provide a form which will limit and confine the side edges of the paving material being deposited upon the road bed below the open bottom of the apparatus.

Referring now especially to FIGURES l and 6 it will be observed that the upper edge of the rear end wall 22 side edges of the latter for convenient access to permit is provided with a horizontal top plate or flange 102. As shown more clearly in FIGURE 8, the side ends of the flange 102 are downturned as at 184 and are welded to the side walls 18 as at 106. A pair of brackets 188 have downturned legs which in turn are welded to the flange 102 as at 112, and thus define an open chamber lying beneath the flange 108 and above the flange 102.

As shown best in FIGURE 1, the. flange 102, has at its.

opposite ends a pair of these brackets 108 supported thereon.

Vertically aligned bores 114 and 116, see FIGURE 8, are provided in the brackets 108 and in the flange 102 and received therethrough the externally threaded upper end 1118 of an adjusting rod 120. Each adjusting rod at its lower end is fixedly secured as by welding, see FIG- URE 10, as shown at 122, to one side of a scraper blade 124. The latter extends across the entire width of the body between the side walls 18, and as shown in FIGURE 10 is slidably received between the rearward surface of the rear end wall 22 and angle brackets 126 which are welded to the side walls as at 128. These brackets thus provide guides which guide and retain the scraper blade 124 against the rearward surface of the rear end wall 22.

A set'of guides 130 are welded or otherwise suitably secured to the rearward surface of the rear end wall, see also FIGURE 2, and thus serve to guidingly support the operating rods 1120. Manually operated hand wheels 132 are threadedly engaged upon the threaded portions 118 of the operating rods between the brackets 108 and the flange 102, as will be readily apparent from a consideration of FIGURES 2, 5, 6 and 8 so that upon rotation of these hand wheels'the operating rods will be raised and lowered and thereby the scraper blade 124 will likewise be vertically adjusted. The arrangement is such that as the scraper blade may be disposed at any desired distance above the surface of the road bed so as to thereby regulate the depth of a layer or coating of paving material which is discharged from the open bottom end of the chamber of the apparatus as the device is moved forward along the road bed.

It will be particularly noted that there are thus provided independent adjustments of the body of the apparatus upon the support wheels 74, and of the scraper edge 124 upon the body, and that each of these adjustments can be effected without effecting the journaliing of the packer roller 44 which is fioatingly journalled in the body.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and de scribed, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

1. A road paver comprising, parallel side walls interconnected by a rearwardly sloping front wall adjacent forward ends of the side walls and a rear end wall disposed forwardly of rear end portions of said side walls, said front and rear end walls defining a hopper between the side walls, supporting wheel means rotatably mounted by said side walls intermediate the front and rear end walls, roller means freely slidable vertically between defined limits on said side walls rearwardly of said rear end wall, side edging means mounted along bottom edges of said side walls and extending beyond said roller means and front wall, vertical adjusting means operatively connected to said side walls and wheel means for vertically adjusting said side walls and side edging means above the ground and thereby operatively position said roller means, and feeding means disposed between said side walls and mounted on said wheel means for rotation about a transversely extending axis, said feeding means distributing paving material uniformly between said side walls, for discharge from the hopper upon said surface to be paved.

2. The combination of claim 1 including a scraper blade secured to said rear end wall and extending downwardly therefrom, means for varying the lower edge of said scraper blade from said surface to be paved whereby to control the thickness of the layer of paving terial applied to said surface from the open bottom end of said hopper.

3. A road paver comprising, parallel side walls interconnected by a rearwardly sloping front wall adjacent fonward ends of the side walls and a rear end wall dis posed forwardly of rear end portions of said side walls, said front and rear end walls defining a hopper between the side walls, supporting wheel means rotatably mounted by said side walls intermediate the front and rear end walls, roller means freely slidable vertically between defined limits on said side walls rearwardly of said rear end wall, side edging means mounted aong bottom edges of said side walls and extending beyond said roller means and front wall, vertically adjusting means operatively connected to said side walls and wheel means for vertically adjusting said side walls and side edging means above the ground and thereby operatively position said roller means, said roller means including a roller disposed between said side walls and mounted for rotation about a transversely extending axis of rotation, said side walls having journals for said roller, and means mounting said journals for vertical movement relative to said side walls.

4. The combination of claim 3 wherein said mountjng means comprises vertical slots in said side walls,

said roller having pintles on its ends received in said journals; said journals being slidably mounted in said slots.

5. The combination of claim 3 including feeding means disposed in said hopper and mounted for rotation about a transversely extending axis, said feeding means distributing paving material uniformly between said side walls for discharge from the open bottom of the latter upon said surface to be paved, said feeding means comprising a shaft, a plurality of axially and circumferentially spaced arms on said shaft.

6. A road paver comprising, parallel side walls interconnected by a rearwardly sloping front wall adjacent for ward ends of the side walls and a rear end wall disposed forwardly of rear end portions of said side walls, said front and rear end walls defining a hopper between the side walls, supporting wheel means rotatably mounted by said side walls intermediate the front and rear end walls, roller means freely slidable vertically between defined limits on said side walls rearwardly of said rear end wall, side edging means mounted along bottom edges of said side walls and extending beyond said roller means and front wall, vertically adjusting means operatively connected to said side walls and wheel means for vertically adjusting said side walls and side edging means above the ground and thereby cperatively position said roller means, feeding means disposed in said hopper and mounted for rotation about a transversely extending axis, said feeding means distributing paving material uniformly between said side walls for discharge from the open bottom of the latter upon said surface to be paved, said feeding means comprising a shaft, a plurality of axially and circumferentially spaced arms on said shaft, said shaft extending through said side walls, said supporting wheel means comprising wheels mounted on said shaft.

7. The combination of claim 6 including journals for said shaft, said side walls having vertical slots slidably receiving said journals.

8. The combination of claim 7 wherein said vertical adjusting means includes brackets on said side walls, rods mounted on said brackets for vertical adjustments, bearings on said rod receiving said shaft.

9. The combination of claim 3 including scraper blade secured to said rear end wall and extending downwardly therefrom, means for varying the lower edge of said scraper blade from said surface to be paved whereby to control the thickness of the layer of paving material applied to said surface from the open bottom end of said hopper, said scraper blade having guide means slidably securing it to said rear end wall, an actuating means secured to said scraper blade for vertically adjusting the latter.

References Cited in the file of this patent UNITED STATES PATENTS 1,581,784- Butler Apr. 20, 1926 2,054,436 Mosel Sept. 15, 1936 2,176,534 Loos Oct. 17, 1939 2,197,878 Robinson Apr. 23, 1940 2,258,205 Halvorson Oct. 7, 1941 2,647,448 Osterfeld Aug. 4, 1953 2,707,422 Canfield May 3, 1955 2,762,276 Mauch Sept. 11, 1956 2,839,975 Robinson June 24, 1958 2,950,660 Standfuss Aug. 30, 1960 FOREIGN PATENTS 544,750 Belgium Feb. 15, 1956 

